- 要定期做这个事情。。。“在短时间内把窗户逐个开超过一条缝,再逐个关上”
- 家里用煤气炉子的时候,窗户需要开着。
- 家里一直有一个窗户开着一条缝。。更佳
https://www.vanee.ca/en/what-is-an-air-exchanger.html
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